Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2007-05-22
2007-05-22
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S211000, C315S169100
Reexamination Certificate
active
11440182
ABSTRACT:
A method of driving a display apparatus includes the steps of (a) providing the display apparatus with a plurality of pixel circuits having an electroluminescence element, a driving transistor for providing driving current to drive the electroluminescence element and a capacitor connected to a gate of the driving transistor, and a column control circuit comprising a transistor, a first switch for providing a voltage signal to a gate of the transistor through a capacitor element, a switch circuit for connecting the gate of the transistor to a reference voltage source, and a second switch capable of providing a current signal to the plurality of pixel circuits from the transistor, and (b) inputting a voltage of blanking level to the capacitor element through the first switch while connecting the gate of the transistor to the reference voltage source by the switch circuit. Additional steps include (c) inputting a video voltage through the first switch value disconnecting the gate of the transistor from the reference voltage source by the switch circuit so that a voltage is held by a gate capacitance of the transistor, (d) providing the current signal to a corresponding pixel circuit through the second switch according to the held voltage, (e) holding the current signal provided to the pixel circuit from the column control circuit as a charging voltage in a capacitor of the pixel circuit, and (f) providing the driving current through the driving transistor to the electroluminescence element based on the charging voltage held by the capacitor.
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Iseki Masami
Kawasaki Somei
Hjerpe Richard
Nguyen Kimnhung
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